Cita APA (7th ed.)

Raup, D. M. (1978). Principles of paleontology (2nd edition.). W.H. Freeman and Co.

Cita Chicago (17th ed.)

Raup, David M. Principles of Paleontology. 2nd edition. New York: W.H. Freeman and Co, 1978.

Cita MLA (9th ed.)

Raup, David M. Principles of Paleontology. 2nd edition. W.H. Freeman and Co, 1978.